I but it on my new Samsung i5 4g ram laptop.
First off it was very different but after and hour and Googling the short cuts combos i actually like and will also install it on my desktop. It runs very smooth and quickly once your on the desktop its basically win7 without the conventional start menu. I have seen a few programs which can mimic a start menu and make the computer boot straight to desktop.
Overall i think its worth upgrading but im just a home user and mainly use it only for internet.